11-28-2011
10 More Discussions You Might Find Interesting
1. Programming
Here is my problem. I don't know make this redirection thing work. The output file (called output.c) looks like this
#include<stdio.h>
int main()
{
int k;
int m;
print f("%d\n", k);
printf("%d\n", m);
return 0;
}
the input file(called input.c) is this
#include<stdio.h>
int... (2 Replies)
Discussion started by: Shallon1
2 Replies
2. UNIX for Dummies Questions & Answers
Greetings,
When directing in unix, symbol > means saving. E.g. I can save ls command output into mama like this:
ls -f > mama
Could someone give me a real example of how the opposite, i.e. symbol < is used?. Could not find its counterpart in Windows (I seem to learn better when i see... (4 Replies)
Discussion started by: alikun
4 Replies
3. UNIX for Dummies Questions & Answers
Hi UF family members,
I am intermediate in Unix language and scripting.I know the redirection systems in unix,but the below statement confuses me:
#!/bin/ksh
. $HOME/.profile 2>&-
Actually this is an extract from a unix script which was trying to set the... (6 Replies)
Discussion started by: DILEEP410
6 Replies
4. Filesystems, Disks and Memory
Hi all,,
Is there any way to redirect the command o/p directaly to a memory location instead of redirecting it to the file?? (1 Reply)
Discussion started by: swap007
1 Replies
5. Shell Programming and Scripting
Hi,
The code below works, it's a part of a bash shell script that serve to search a pattern $pattern_da_cercare in the files contained in a directory $directory_iniziale.
Now the proble is:
How can I redirect stderr to a file?
PS: so I want to redirect ALL the errors to a file.
I tryed... (9 Replies)
Discussion started by: DNAx86
9 Replies
6. Programming
Hi,
To explain this question I will have to go into a bit of detail. I hope you don't mind.
currently I have a log handler (an already compiled c++ version) and what it does is makes a log file and writes all the unix output (echo, etc) of a script to that log file. To me the log_handler is... (3 Replies)
Discussion started by: fluke_perf
3 Replies
7. Shell Programming and Scripting
Hi all,
Actually i need to know whether there is any way to redirect the output of shell operations into any file without pipe .
Actually my problem is , i run some command & its result is displayed on shell after some calculations on shell, so if i redirect its output to file, it is not... (5 Replies)
Discussion started by: sarbjit
5 Replies
8. UNIX for Dummies Questions & Answers
Hi Guys,
I m new to UNIX and new to this forum. Was wondering if someone can help me understand redirection (standard input output pipeline etc)
for starters, not too sure what this would mean
who | sort > sortedfile | pr | lp
im starting to understand common commands but when throwing... (2 Replies)
Discussion started by: jmack123
2 Replies
9. Shell Programming and Scripting
Hi Guys,
I have a script for which the stdout and stderr should be redirected to a log file, they should not be printed on the screen. Could you please let me know the procedure to redirect the output of the script to a log file. Thanks in advance.
--- Aditya (5 Replies)
Discussion started by: chaditya
5 Replies
10. Shell Programming and Scripting
Hello All,
I am using the below script to gather various tools running by the user, we have more than 100 tools running on the server so my challenge is to redirect memory & cpu load to the file with the name of the tool.so am using the below script i am stucking how to redirect to the file... (2 Replies)
Discussion started by: ajaincv
2 Replies
LEARN ABOUT DEBIAN
unblock_dlg
UNBLOCK_DLG(1) General Commands Manual UNBLOCK_DLG(1)
NAME
unblock_dlg - Insert linefeeds into an optional-format Digital Line Graph (DLG) file
SYNOPSIS
unblock_dlg [-L]
DESCRIPTION
The drawmap program processes USGS optional-format Digital Line Graph (DLG) files (along with other types of files) to produce customized
maps. Drawmap is able to read these files in their native format. However, since the files usually don't contain any linefeeds, they are
difficult for a human to read. Unblock_dlg filters a DLG file and inserts linefeeds for human readability. It takes input from the stan-
dard input and writes to the standard output. The input data must be in uncompressed form, not in gzip-compressed form. Also, unblock_dlg
does not work with SDTS DLG files.
Unblock_dlg normally takes no options, but, if you use the "-L" option, the program will print out some license information and exit.
Some DLG files already have embedded linefeeds. Unblock_dlg makes a feeble attempt to detect these files and abort. If the detection
fails, the results are likely to be garbled, so it is wise to check the format of each file first. The drawmap program, with the "-i"
option, will attempt to tell you whether a file contains linefeeds or not.
The intended use of unblock_dlg is simply to let you conveniently examine the files to see what is in them. However, if you are in the
mood for adventure, or if you need to repair a defective file, you can use unblock_dlg to make the file easy to edit, then you can edit the
file as desired. Drawmap can still process the files after linefeeds are inserted, but will become confused if any line (including the
linefeed) is more than 80 characters long. Drawmap may also become confused if you make any significant changes to the format of the file.
You can use this capability to remove selected items from DLG files, when those items cause problems. You may even be able to repair
faulty data. However, you need to be familiar with the content and structure of DLG files in order to do this effectively. You also need
to remember that drawmap depends on DLG files having a predictable structure, and it won't properly parse files that violate this pre-
dictability. Do this sort of thing only if you know what you are doing, or if you have a lot of free time on your hands.
It should be noted that you can obtain a similar effect by using the command recommended by the USGS:
dd if=inputfilename of=outputfilename ibs=8000 cbs=80 conv=unblock
I prefer the unblock_dlg command because it simply replaces the last byte of each record with a linefeed. This lets me easily tell how
long the original records were. The effect of unblock_dlg or dd can be undone by typing:
dd if=inputfilename of=outputfilename ibs=8000 cbs=80 conv=block
You may come across files that have a linefeed in the 81st byte. Drawmap doesn't like these, both because it can't tell (within the space
of the first 80-byte record) whether the file contains linefeeds or not, and because the records exceed the maximum record length of 80
bytes. You may be able to repair such files by blocking them with the above dd command.
SEE ALSO
unblock_dem(1), drawmap(1)
Jul 24, 2001 UNBLOCK_DLG(1)